Moron

The word scientists forgot to add along with protons, electrons and neutrons, that describes how complete and utterly stupid someone is.

Me: Hey Connor want to go to the park later?
Connor: I didn't know we had a park.

Me: Connor, we've had it forever, its a block away from us.
Connor: Wow God really does exist,

Me: You know, scientists managed to discover electrons, protons and neutrons, but there is one they forgot.
Connor: What?
Me: MORONS.